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SOLVED Possible Kernel problems with ubuntu 18.04 and latest kernel

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Re: SOLVED Possible Kernel problems with ubuntu 18.04 and latest kernel
« Reply #28 on: June 02, 2018, 01:28:14 AM »
 

DeepThought

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Thank you @Jerry
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Re: SOLVED Possible Kernel problems with ubuntu 18.04 and latest kernel
« Reply #27 on: June 02, 2018, 01:22:19 AM »
 

Jerry

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Excellent information here.

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Re: SOLVED Possible Kernel problems with ubuntu 18.04 and latest kernel
« Reply #26 on: June 02, 2018, 01:15:07 AM »
 

DeepThought

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 I have managed to find a one-click solution to this problem and had a massive DOH!!! moment after all the kernel installing/testing/compiling I have done over the last few days :(

Since I was convinced the problem was with the kernel I refined my google searches to "Kernel preventing reboot/shutdown" instead of "Ubuntu 18.04 not rebooting/shutting down" and found the answer.

The problem stems from 2 differing technologies for Power management. APM (Advanced Power Management) and ACPI (Advanced Configuration and Power Interface) with APM being the older and slowly deprecated technology.The main difference that led me to my solution was, APM is centered on the BIOS while ACPI is centered on the operating system.

http://www.differencebetween.net/technology/software-technology/difference-between-apm-and-acpi/

So from info found on the net I looked through my bios configuration for anything mentioning apm or acpi but only found PowerNow (AMD PowerNow! is AMD's dynamic frequency scaling and power saving technology for laptop processors).

https://en.wikipedia.org/wiki/PowerNow!

I disabled PowerNow, saved the bios config and rebooted and that was it, laptop rebooting and shutting down as it should do.

To further confirm this I looked through the config for a few of the kernels that didn't work and found no reference to APM, which I assume means APM support is no longer been built into or built as a module for todays kernels.


So after a clean install of LL 4.0 my laptop is chirping away quite happy to reboot or shutdown properly.

Hope this adventure helps anyone with similar power management problems :)
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Re: SOLVED Possible Kernel problems with ubuntu 18.04 and latest kernel
« Reply #25 on: June 01, 2018, 05:30:47 PM »
 

NN

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Hi DeepThought and NN,
I haven't looked at the difference yet. Just wondering why you are not using the option in Lite Tweaks to install alternative kernels?
:)

Hi, LL-user!

For me ukuu is better. Tastes differ, you know. :)
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Re: SOLVED Possible Kernel problems with ubuntu 18.04 and latest kernel
« Reply #24 on: June 01, 2018, 08:54:41 AM »
 

DeepThought

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@Jerry   So glad it wasn't me lol. Anyway I'll update sources next time I try it, atm I'm attempting to compile a kernel v.4.15 using the config file fron v4.7.2 which I know works, using make oldconfig, so should be fun lol
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Re: SOLVED Possible Kernel problems with ubuntu 18.04 and latest kernel
« Reply #23 on: June 01, 2018, 08:48:20 AM »
 

Jerry

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Hi LL-user
I've had a look at the kernel-installer in Lite-Tweaks but that doesn't seem to do anything. Here's a screenshot of what I get using that tweak.



Not sure if it's a bug, me or it only uses kernels already downloaded and on the pc

It was a bug @DeepThought thank you for the report. It is now fixed. Make sure you update sources when it asks you on the Kernel Installer.
 

Re: SOLVED Possible Kernel problems with ubuntu 18.04 and latest kernel
« Reply #22 on: June 01, 2018, 07:55:07 AM »
 

DeepThought

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Hi LL-user
I've had a look at the kernel-installer in Lite-Tweaks but that doesn't seem to do anything. Here's a screenshot of what I get using that tweak.



Not sure if it's a bug, me or it only uses kernels already downloaded and on the pc
« Last Edit: June 01, 2018, 07:56:52 AM by DeepThought »
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Re: SOLVED Possible Kernel problems with ubuntu 18.04 and latest kernel
« Reply #21 on: June 01, 2018, 07:36:54 AM »
 

LL-user

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Hi DeepThought and NN,
I haven't looked at the difference yet. Just wondering why you are not using the option in Lite Tweaks to install alternative kernels?
:)
 

Re: SOLVED Possible Kernel problems with ubuntu 18.04 and latest kernel
« Reply #20 on: June 01, 2018, 03:09:49 AM »
 

DeepThought

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 After a clean install of LL 4.0 Final the issue is still there. Latest kernels just won't power off the Dell Inspiron laptop properly. Had I not stuck to LTS versions I might have noticed this problem a while back but I'll continue using ukuu to find a newer kernel that works.

I am tempted to recompile the base 18.04 kernel v4.15 but it's been a long time since I've attempted a kernel compile so will need to do some reading beforehand :)
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Re: SOLVED Possible Kernel problems with ubuntu 18.04 and latest kernel
« Reply #19 on: May 31, 2018, 11:27:53 AM »
 

NN

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couldn't find an official ukuu package



So, the official site of the developers is here: http://www.teejeetech.in/p/ukuu-kernel-upgrade-utility.html

Hence their official PPA is here: http://ppa.launchpad.net/teejee2008/ppa/ubuntu/pool/main/u/ukuu/

You can download the required package for installation manually or you can do that by adding the PPA:

sudo apt-add-repository -y ppa:teejee2008/ppa

sudo apt-get update

sudo apt-get install ukuu


« Last Edit: May 31, 2018, 11:30:25 AM by NN »
... let the dead bury their dead (Matthew 8:22)
 

Re: SOLVED Possible Kernel problems with ubuntu 18.04 and latest kernel
« Reply #18 on: May 31, 2018, 11:08:22 AM »
 

DeepThought

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@NN   Thanks for the clarification, I did a quick search but couldn't find an official ukuu package but noticed it had been added to a few ppa's.

  Anyway,  it's a good app and easy enough to install and use if anyone else needs it :)
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Re: SOLVED Possible Kernel problems with ubuntu 18.04 and latest kernel
« Reply #17 on: May 31, 2018, 10:55:00 AM »
 

NN

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now in the repositories. It saves adding a ppa, thanks for that info :)

And the PPA is http://ppa.launchpad.net/teejee2008/ppa/ubuntu - the same repo as for conky-manager and TimeShift. I see now why I managed to install ukuu in the terminal. :)
« Last Edit: May 31, 2018, 10:56:38 AM by NN »
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Re: SOLVED Possible Kernel problems with ubuntu 18.04 and latest kernel
« Reply #16 on: May 31, 2018, 10:38:03 AM »
 

DeepThought

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@NN  I'm glad it worked for you :)

 I wasn't aware that it had been recognised officially and was now in the repositories. It saves adding a ppa, thanks for that info :)
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Re: SOLVED Possible Kernel problems with ubuntu 18.04 and latest kernel
« Reply #15 on: May 31, 2018, 10:21:20 AM »
 

Scott

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@Jerry
Thanks!

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Re: SOLVED Possible Kernel problems with ubuntu 18.04 and latest kernel
« Reply #14 on: May 31, 2018, 10:20:19 AM »
 

NN

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@NN  Thank you.  It is a useful tool and I'm sure you'll find it helpful :)

Yes, I do find the prog (short for 'program', lol) very helpful, it has become a must have app for me as now I know how to avoid buggy kernels (the app is good not only for kernel update but also for kernel rollback).  :D  And the app is very intuitive, so I had nothing special to study about it. Look, what kernel I am using now! :D



DeepThought, thank you once again for your very helpful advice about this app. By the way, Gdebi told me that the app (ukuu) is available in the software-center, so I installed ukuu by means of the terminal (there occured to be no need for downloading the app from the site). :)

sudo apt install ukuu


« Last Edit: May 31, 2018, 11:50:26 AM by NN »
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